Files
goTorrent/goTorrentWebUI/node_modules/material-ui/utils/keyboardFocus.js

76 lines
2.4 KiB
JavaScript

'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.focusKeyPressed = focusKeyPressed;
exports.detectKeyboardFocus = detectKeyboardFocus;
exports.listenForFocusKeys = listenForFocusKeys;
var _keycode = require('keycode');
var _keycode2 = _interopRequireDefault(_keycode);
var _warning = require('warning');
var _warning2 = _interopRequireDefault(_warning);
var _contains = require('dom-helpers/query/contains');
var _contains2 = _interopRequireDefault(_contains);
var _ownerDocument = require('dom-helpers/ownerDocument');
var _ownerDocument2 = _interopRequireDefault(_ownerDocument);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
// weak
var internal = {
focusKeyPressed: false
};
function focusKeyPressed(pressed) {
if (typeof pressed !== 'undefined') {
internal.focusKeyPressed = Boolean(pressed);
}
return internal.focusKeyPressed;
}
function detectKeyboardFocus(instance, element, callback) {
var attempt = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 1;
process.env.NODE_ENV !== "production" ? (0, _warning2.default)(instance.keyboardFocusCheckTime, 'Material-UI: missing instance.keyboardFocusCheckTime') : void 0;
process.env.NODE_ENV !== "production" ? (0, _warning2.default)(instance.keyboardFocusMaxCheckTimes, 'Material-UI: missing instance.keyboardFocusMaxCheckTimes') : void 0;
instance.keyboardFocusTimeout = setTimeout(function () {
var doc = (0, _ownerDocument2.default)(element);
if (focusKeyPressed() && (doc.activeElement === element || (0, _contains2.default)(element, doc.activeElement))) {
callback();
} else if (attempt < instance.keyboardFocusMaxCheckTimes) {
detectKeyboardFocus(instance, element, callback, attempt + 1);
}
}, instance.keyboardFocusCheckTime);
}
var FOCUS_KEYS = ['tab', 'enter', 'space', 'esc', 'up', 'down', 'left', 'right'];
function isFocusKey(event) {
return FOCUS_KEYS.indexOf((0, _keycode2.default)(event)) !== -1;
}
var handleKeyUpEvent = function handleKeyUpEvent(event) {
if (isFocusKey(event)) {
internal.focusKeyPressed = true;
}
};
function listenForFocusKeys(win) {
// The event listener will only be added once per window.
// Duplicate event listeners will be ignored by addEventListener.
// Also, this logic is client side only, we don't need a teardown.
win.addEventListener('keyup', handleKeyUpEvent);
}